The Plastic Age by Percy Marks

The next morning Hugh's mother and father arrived in the automobile. He was to drive them back to Merrytown the day after commencement. At last he stood in the doorway of the Nu Delta house and welcomed his father, but he had forgotten all about that youthful dream. He was merely aware that he was enormously glad to see the "folks" and that his father seemed to be withering into an old man.

As the underclassmen departed, the alumni began to arrive. The "five year" classes dressed in extraordinary outfits -- Indians, Turks, and men in prison garb roamed the campus. There were youngsters just a year out of college, still looking like undergraduates, still full of college talk. The alumni ranged all the way from these one-year men to the fifty-year men, twelve old men who had come back to Sanford fifty years after their graduation, and two of them had come all the way across the continent. There had been only fifty men originally in that class; and twelve of them were back.